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48ab1c2f | 1 | /* Get loaded objects program headers. |
581c785b | 2 | Copyright (C) 2001-2022 Free Software Foundation, Inc. |
48ab1c2f | 3 | This file is part of the GNU C Library. |
48ab1c2f UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
cc7375ce RM |
6 | modify it under the terms of the GNU Lesser General Public License as |
7 | published by the Free Software Foundation; either version 2.1 of the | |
48ab1c2f UD |
8 | License, or (at your option) any later version. |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
cc7375ce | 13 | Lesser General Public License for more details. |
48ab1c2f | 14 | |
cc7375ce | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; see the file COPYING.LIB. If |
5a82c748 | 17 | not, see <https://www.gnu.org/licenses/>. */ |
48ab1c2f UD |
18 | |
19 | #include <errno.h> | |
20 | #include <ldsodefs.h> | |
21 | #include <stddef.h> | |
ec999b8e | 22 | #include <libc-lock.h> |
48ab1c2f | 23 | |
e07bb02a UD |
24 | static void |
25 | cancel_handler (void *arg __attribute__((unused))) | |
26 | { | |
5a2a1d75 | 27 | __rtld_lock_unlock_recursive (GL(dl_load_write_lock)); |
e07bb02a UD |
28 | } |
29 | ||
48ab1c2f UD |
30 | int |
31 | __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info, | |
32 | size_t size, void *data), void *data) | |
33 | { | |
34 | struct link_map *l; | |
35 | struct dl_phdr_info info; | |
36 | int ret = 0; | |
37 | ||
5a2a1d75 AS |
38 | /* Make sure nobody modifies the list of loaded objects. */ |
39 | __rtld_lock_lock_recursive (GL(dl_load_write_lock)); | |
2ae1ae5c | 40 | __libc_cleanup_push (cancel_handler, NULL); |
48ab1c2f | 41 | |
c0f62c56 UD |
42 | /* We have to determine the namespace of the caller since this determines |
43 | which namespace is reported. */ | |
c0f62c56 UD |
44 | size_t nloaded = GL(dl_ns)[0]._ns_nloaded; |
45 | Lmid_t ns = 0; | |
3a2edc79 UD |
46 | #ifdef SHARED |
47 | const void *caller = RETURN_ADDRESS (0); | |
22c83193 | 48 | for (Lmid_t cnt = GL(dl_nns) - 1; cnt > 0; --cnt) |
c0f62c56 UD |
49 | for (struct link_map *l = GL(dl_ns)[cnt]._ns_loaded; l; l = l->l_next) |
50 | { | |
51 | /* We have to count the total number of loaded objects. */ | |
52 | nloaded += GL(dl_ns)[cnt]._ns_nloaded; | |
53 | ||
54 | if (caller >= (const void *) l->l_map_start | |
9be09e06 UD |
55 | && caller < (const void *) l->l_map_end |
56 | && (l->l_contiguous | |
57 | || _dl_addr_inside_object (l, (ElfW(Addr)) caller))) | |
c0f62c56 UD |
58 | ns = cnt; |
59 | } | |
3a2edc79 | 60 | #endif |
c0f62c56 UD |
61 | |
62 | for (l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next) | |
48ab1c2f | 63 | { |
74718d13 UD |
64 | info.dlpi_addr = l->l_real->l_addr; |
65 | info.dlpi_name = l->l_real->l_name; | |
66 | info.dlpi_phdr = l->l_real->l_phdr; | |
67 | info.dlpi_phnum = l->l_real->l_phnum; | |
bed12f78 | 68 | info.dlpi_adds = GL(dl_load_adds); |
c0f62c56 | 69 | info.dlpi_subs = GL(dl_load_adds) - nloaded; |
d78efd9f | 70 | info.dlpi_tls_data = NULL; |
74718d13 | 71 | info.dlpi_tls_modid = l->l_real->l_tls_modid; |
d78efd9f | 72 | if (info.dlpi_tls_modid != 0) |
74718d13 | 73 | info.dlpi_tls_data = GLRO(dl_tls_get_addr_soft) (l->l_real); |
48ab1c2f UD |
74 | ret = callback (&info, sizeof (struct dl_phdr_info), data); |
75 | if (ret) | |
76 | break; | |
77 | } | |
78 | ||
79 | /* Release the lock. */ | |
e07bb02a | 80 | __libc_cleanup_pop (0); |
5a2a1d75 | 81 | __rtld_lock_unlock_recursive (GL(dl_load_write_lock)); |
48ab1c2f UD |
82 | |
83 | return ret; | |
84 | } | |
27d640be | 85 | hidden_def (__dl_iterate_phdr) |
48ab1c2f | 86 | |
48ab1c2f | 87 | weak_alias (__dl_iterate_phdr, dl_iterate_phdr); |